Strain hardening behavior of linear friction welded joints between TC11 and TC17 dissimilar titanium alloys

Zhao, Ping; Fu, Li

doi:10.1016/j.msea.2014.10.044

Cited by 36 publications

(14 citation statements)

References 63 publications

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“…Several authors studied the tensile properties of similar LFW joints using as PM comparable alloys to Ti6242, such as TA6V and IMI-834. 8,[10][11][12][13][14][15][16][17][18][19] Some similar and dissimilar joints failed far from the WCZ. 10,12,14,15,17,18 For instance, Dalgaard et al 20 observed that the formation of a fine microstructure in the WCZ of a similar IMI-834 LFW joint led to a weld overmatch.…”

Section: Introductionmentioning

confidence: 99%

Strength and fatigue strength of a similar Ti‐6Al‐2Sn‐4Zr‐2Mo‐0.1Si linear friction welded joint

García

Morgeneyer

2019

Fatigue Fract Eng Mat Struct

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Strengths for monotonic and cyclic loadings of similar overmatching Ti‐6Al‐2Sn‐4Zr‐2Mo‐0.1Si (Ti6242) linear friction welds (LFW) were studied and compared with the parent material (PM) behaviour. Non‐destructive synchrotron observations revealed the presence of pores in the weld interface. The weld centre zone (WCZ) showed a higher strength leading to lower macroscopic ductility of the cross‐weld samples. Local strain and normalized strain rate have been assessed by stereo digital image correlation (DIC) and revealed an early plastic activity at yielding in the vicinity of the WCZ attributed to residual stresses. For the target life, the fatigue strength was slightly reduced but compromised by a strong scatter. Indeed, an internal fish‐eye fatigue crack initiation was found on an unexpected dendritic defect that was very different from the PM microstructure and the known martensitic α′ in the WCZ. The dendritic defect was linked to surface contamination prior to welding and led to melting.

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Section: Introductionmentioning

confidence: 99%

Strength and fatigue strength of a similar Ti‐6Al‐2Sn‐4Zr‐2Mo‐0.1Si linear friction welded joint

García

Morgeneyer

2019

Fatigue Fract Eng Mat Struct

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“…Wen et al made LFW dissimilar joints of Ti-6Al-4V and Ti-6.5Al-3.5Mo-1.5Zr-0.3Si and evaluated the microstructure, microhardness, and fatigue properties of the joint, which had essentially symmetrical hysteresis loops and an equivalent fatigue life to the base metals [21]. Zhao et al investigated the influence of strain rate on the tensile properties of LFW dissimilar joints between Ti-6.5Al-3.5Mo-1.5Zr-0.3Si and Ti-4Mo-4Cr-5Al-2Sn-2Zr titanium alloys [22]. Frankel et al compared the residual stresses between Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo [23].…”

Section: Introductionmentioning

confidence: 99%

“…Although LFW is a promising process for joining dissimilar titanium alloys, there are only a few public papers on this subject [20][21][22][23]. There are a great many publications about the LFW process for same titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Friction Welding Joints with Dissimilar Titanium Alloys

Zhao

2016

Metals

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Titanium alloys, which are important in aerospace application, offer different properties via changing alloys. As design complexity and service demands increase, dissimilar welding of the titanium alloys becomes a particular interest. Linear friction welding (LFW) is a relatively novel bond technique and has been successfully applied for joining titanium alloys. In this paper, dissimilar joints with Ti-6Al-4V and Ti-5Al-2Sn-2Zr-4Mo-4Cr alloys were produced by LFW process. Microstructure was studied via optical microscopy and scanning electron microscopy (SEM), while the chemical composition across the welded samples was identified by energy dispersive X-ray spectroscopy. Mechanical tests were performed on welded samples to study the joint mechanical properties and fracture characteristics. SEM was carried out on the fracture surface to reveal their fracture modes. A significant microstructural change with fine re-crystallization grains in the weld zone (WZ) and small recrystallized grains in the thermo-mechanically affected zone on the Ti-6Al-4V side was discovered in the dissimilar joint. A characteristic asymmetrical microhardness profile with a maximum in the WZ was observed. Tensile properties of the dissimilar joint were comparable to the base metals, but the impact toughness exhibited a lower value.

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“…The joining of dissimilar titanium alloys can achieve the desired properties, and it can also result in the efficient utilization of each material and save on expenditure. Research on the welding of dissimilar titanium alloys has been conducted [3][4][5][6]. Recently, a new type of Ti-Al-Sn-Zr-Mo-Nb-W-Si series high temperature titanium alloy, BTi-6431S, has become the focus of attention as a potential material for aircraft engine applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of laser beam offset on microstructure and mechanical properties of pulsed laser welded BTi-6431S/TA15 dissimilar titanium alloys

Zhang

Shen

et al. 2015

Optics & Laser Technology

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Strain hardening behavior of linear friction welded joints between TC11 and TC17 dissimilar titanium alloys

Cited by 36 publications

References 63 publications

Strength and fatigue strength of a similar Ti‐6Al‐2Sn‐4Zr‐2Mo‐0.1Si linear friction welded joint

Strength and fatigue strength of a similar Ti‐6Al‐2Sn‐4Zr‐2Mo‐0.1Si linear friction welded joint

Microstructure and Mechanical Properties of Friction Welding Joints with Dissimilar Titanium Alloys

Effect of laser beam offset on microstructure and mechanical properties of pulsed laser welded BTi-6431S/TA15 dissimilar titanium alloys

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